Which cancer treatments cause mouth sores?

In general, cancer treatments that can cause mouth sores include:

• Chemotherapy
• Radiation therapy aimed at the head and neck
• Bone marrow transplant, also known as a stem cell transplant
• Targeted therapy
• Immunotherapy

Whether your cancer treatment will cause mouth sores depends on which treatments you have and what doses you receive. Ask your health care provider whether your specific medicines or treatments might cause mouth sores.